Control of AAD dicot volunteers in monocot crops

ABSTRACT

The subject invention relates in part to the control of AAD-12 and/or AAD-13 dicot volunteers in fields planted with monocot crops such as corn. The dicots can include soybeans and cotton.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a national phase application, filed pursuant to 35 U.S.C. §371, of PCT application No. PCT/US2010/057998, filed on Nov. 24, 2010, which claims the benefit of U.S. Provisional Application No. 61/263,950, filed on Nov. 24, 2009 and U.S. Provisional Application No. 61/328,942, filed on Apr. 28, 2010. The prior applications are incorporated herein by reference in their entirety.

BACKGROUND

Corn (monocot) and soybeans (dicot), for example, can be rotated in various crop rotation cycles in various geographies. Cotton is also a dicot.

“Volunteer” plants are unwanted plants from the prior growing season that emerge in a field planted with crops for the current growing season. Volunteers are basically weeds, and can, like weeds, reduce harvest and yield of the crop of interest for the current growing season. The volunteers divert fertilizer resources and the like from the desired crops.

Unlike plain weeds, volunteers are often specifically engineered to be resistant to some herbicides. Thus, controlling volunteers can be more difficult than controlling naturally occurring weeds.

AAD (aryloxy alkanoate dioxygenase) genes as described herein impart high levels of tolerance to 2,4-D herbicides in plants that are transformed with an AAD gene.

AAD-1 genes also impart high levels of tolerance to phenoxy- and aryloxyphenoxyproplonate herbicides (“fops” such as fluazifop and haloxyfop). (AAD-1 genes are described in WO 2007/053482.) Thus, AAD-1 allows the use of some fops as either selection agents or as herbicides on crops where crop destruction would be expected without the AAD-1 gene.

AAD-12 and AAD-13 genes also impart high levels of tolerance to pyridyloxyacetate herbicides (such as triclopyr and fluroxypyr; “pyrs”) to soybeans and other dicot species transformed with the gene. Thus, AAD-12 and AAD-13 each allow the use of pyrs as either selection agents or as herbicides on crops where crop destruction would be expected without the AAD-12 or AAD-13 gene.

There are very numerous dicot-only herbicides that kill dicots, or selective dicots.

BRIEF SUMMARY

The subject invention relates in part to the control of AAD-12 and/or AAD-13 dicot volunteers in fields planted with monocot crops such as corn. The dicots can include soybeans and cotton.

The subject invention also relates in part to the recognition that one potential downside to the use of AAD genes is that volunteers can be resistant to 2,4-D, as well as to pyrs (in the case of AAD-12 and AAD-13). Thus, in the case of AAD-12 or -13, pyr herbicides will no longer be effective for control of these volunteer AAD soybeans or cotton, for example, in fields planted with monocots such as corn. The subject invention relates in part to the recognition that when an AAD gene is stacked in dicots with other herbicide resistance traits (such as glyphosate, glufosinate, and the like), control of any resulting volunteer dicot plants in the following year can be an issue.

According to the subject invention, dicamba is selected, from almost innumerable other options, as being useful according to the subject invention for the control of volunteer AAD (such as AAD-12) dicot plants in a corn field.

In other embodiments, clopyralid is used for the control of volunteer AAD (such as AAD-12) dicot plants in a corn field.

Corn is naturally tolerant to both dicamba and clopyralid.

Yet another option for controlling volunteer AAD (such as AAD-12) dicots is triazines such as atrazine.

Another option according to the subject invention is if the dicots of the previous season were susceptible to either glyphosate or glufosinate, and the corn crop is tolerant to glyphosate or glufosinate, then glyphosate or glufosinate, respectively, could be used to control the dicot volunteers. Glyphosate could accordingly be used in a field of ROUND UP READY corn. Glufosinate could accordingly be used in a field of LIBERTY LINK corn. If the dicots of the previous season were susceptible to both glyphosate and glufosinate (that is, if the dicots did not have either resistance trait), and the corn crop is tolerant to both glyphosate and glufosinate, then either glyphosate or glufosinate or both could be used to control the dicot volunteers.

If the dicot (such as soy), however, comprises a PAT gene, for example, this would preclude the use of glufosinate to control the dicot volunteers (as the dicot PAT volunteers would tolerate glufosinate).

DETAILED DESCRIPTION

As used herein and unless otherwise specified, preferred dicots are soybeans or cotton.

One aspect of the subject invention includes the use of dicamba herbicides to remove volunteer AAD-12 or -13 dicots in a field of monocots, such as corn.

In some specific embodiments, the AAD-12 is present in soybeans as the AAD-12 soy event designated DAS-68416-4 having seed deposited with American Type Culture Collection (ATCC) with Accession No. PTA-10442, and progeny derived thereof. 2500 seeds were deposited in accordance with the Budapest Treaty on Oct. 22, 2009. The deposit was tested on Nov. 2, 2009, and on that date, the seeds were viable. Such events are disclosed in U.S. Ser. No. 61/263,950 (filed Nov. 24, 2009). Such AAD-12 dicot volunteers could be present in the following year's corn fields. Thus, the subject invention includes the application of a dicamba (or other as disclosed herein) herbicide to volunteer AAD-12 soy plants, particularly where the soybean plant comprises the 68416-4 event. Such “416” event plants comprise SEQ ID NO:1. AAD-12 protein sequences can be found in WO 2007/053482 (SEQ ID NO:2 and SEQ ID NO:4). AAD-13 protein sequences can be found in WO 2008/141154 (SEQ ID NO:2 and SEQ ID NO:4). Sequences for use in accordance with the subject invention can have at least 75%, 80%, 85%, 90%, 95%, or 99%, for example, sequence identity with any of these sequences.

Because of the specific detoxifying aspects of AAD genes, dicamba herbicides applied to corn fields would not be subject to detoxification by the AAD gene of the dicot volunteers, and AAD-12 or -13 dicot volunteers would remain highly susceptible to the dicamba herbicide.

According to the subject invention, various herbicide chemistries have been carefully selected to provide control of AAD-12 or -13 dicots as detailed herein. For example, when an AAD-12 or -13 gene was used alone in the previous season's dicot (such as soybeans), dicamba, clopyralid, atrazines, glyphosate, and/or glufosinate could be used to control volunteer AAD soybeans (or cotton), assuming that the soybeans (or other dicots) were naturally or engineered to be resistant to any of these herbicides.

That is, if the volunteer AAD-12 or -13 dicots were also stacked with a glyphosate- or glufosinate-trait, then glufosinate or glyphosate, respectively, could be used in the corn field of the current season, assuming that the corn also has a resistance trait against glufosinate or glyphosate, respectively.

Even if these AAD soybean volunteers possess glyphosate- and glufosinate-tolerance traits, dicamba (and/or the others) could still be used to control those volunteers.

Selection of herbicides to use on the current planted fields, according to the subject invention, can thus depend in part on the herbicide-tolerance trait(s) that were used in the previous season dicot, and on the tolerance trait(s) present in the field of corn (or other monocot) crop of the current growing season. Thus, additional herbicide chemistries can provide control of AAD-12 or -13 dicot volunteers.

In Roundup Ready (or GAT or other glyphosate-tolerant crops) or Liberty Link (or other glufosinate-tolerant crops) corn fields, for example, glyphosate or glufosinate, respectively, can be used to control the AAD dicot volunteers, assuming the dicot volunteers do not also possess that same respective herbicide-tolerance trait. Again, a PAT gene in the soy (or other dicot) would preclude the use of glufosinate for controlling the soy (or other dicot) volunteers.

EXAMPLES Example 1 Control of Volunteer AAD-12 Soybean in a Field Planted with AAD-1 Corn Using Alternative Herbicides

In one embodiment, volunteer transgenic soybean lines containing the AAD-12 expression cassette are controlled within a field of AAD-1 corn by the application of a herbicide or combination of herbicides. The specific herbicide used to control the volunteer transgenic AAD-12 soybean line is dependent upon the type of AAD-1 corn seed being planted within the field (e.g., stacked with Round-up Ready trait, Liberty Link trait, or other herbicide tolerant traits).

Furthermore, the AAD-12 trait may be stacked with other additional herbicide tolerant trait(s) via conventional breeding or a molecular stack. In such an example, the specific herbicide used to control the volunteer AAD-12 soybean stacked with another herbicide tolerant trait(s) will be dependent upon the additional herbicide tolerant trait(s) and the type of AAD-1 corn being planted within the field.

The application of a given herbicide can be made before planting at pre-emergence/burndown or post-emergence after planting to control the volunteer transgenic AAD-12 soybean lines. Table 1 lists the herbicides to be used at the different stages of planting (pre-emergence or post-emergence) to control volunteer transgenic soybean in a field planted with corn containing herbicide tolerant trait(s). Table 2 lists the herbicides to be used at different stages of planting to control volunteer AAD-12 soybean in a field planted with corn containing the AAD-1 herbicide tolerant trait. At or about a 1× Field Rate concentration of herbicide would be applied, as either a tank mix or alone, to the field for both pre-emergent and post-emergent volunteer control.

The control of transgenic soybean plants containing the AAD-12 expression cassette within a field of AAD-1 corn would be applicable for the control of volunteer AAD-12 transgenic dicot plants (including, but not limited too; soybean, cotton, canola, flax, sunflower, legumes, alfalfa, peanut, and tomato) within a field being planted with a monocot crop (including, but not limited too; corn, rice, sugar cane, switch grass, turf grass species, sorghum, barley, wheat, and oats, and durum). The example described above, in which volunteer transgenic AAD-12 soybean plants are controlled in an AAD-1 corn field, is illustrative of the invention and not intended to restrict the scope of this embodiment.

Example 2 Control of Volunteer Soybean (Conventional or Containing Non-AAD Herbicide Tolerance Traits) in a Field Planted with AAD Corn Using Alternative Herbicides

In an embodiment, volunteer transgenic soybean lines (containing the Clear Field trait, Roundup Ready or other Glyphosate Tolerant Trait, Liberty Link Trait, Imidazolonine tolerant trait, or any stacked combination thereof) or volunteer conventional soybean lines are controlled within a field of transgenic AAD corn (either AAD-1 or AAD-12) by the application of a herbicide or combination of herbicides. The specific herbicide used to control the volunteer soybean plants is dependent upon the type of soybean seed being planted within the field (e.g., conventional soybean, Round-up Ready Soybean, Liberty Link Soybean, etc.).

Moreover, the specific herbicide used to control the volunteer conventional or transgenic soybean line is dependent upon the type of AAD transgenic corn seed (i.e. stacked traits or alone) being planted within the field and the trait possessed by the volunteer soybean line. For example an AAD-1 transgenic corn line that has been stacked with another herbicide tolerant trait such as PAT could be sprayed with a herbicide mixture containing glufosinate and a combination or single application of fluroxypyr, triclopyr, and/or 2,4-D; but only where the preceding volunteer plants do not contain PAT (or other glufosinate tolerant trait) and AAD-1.

The application of a given herbicide can be made before planting at pre-emergence/burndown or post-emergence after planting to control the volunteer conventional or transgenic soybean lines. Table 3 lists the herbicides to be used at the different stages of planting (pre-emergence or post-emergence) to control volunteer conventional or transgenic soybean. At or about a 1× Field Rate concentration of herbicide would be applied, as either a tank mix or alone, to the field for both pre-emergent and post-emergent volunteer control.

The control of conventional or transgenic soybean plants containing a herbicide tolerant expression cassette within a field of AAD transgenic corn (either stacked with other herbicide tolerant traits or alone) would be applicable for the control of a conventional or herbicide tolerant transgenic dicot plant (including, but not limited too; soybean, cotton, canola, flax, sunflower, legumes, alfalfa, peanut, and tomato) within a field being planted with a AAD transgenic monocot crop (including, but not limited too; corn, rice, sugar cane, switch grass, turf grass species, sorghum, barley, wheat, and oats, and durum). The example described above, in which volunteer conventional or transgenic herbicide tolerant soybean plants are controlled in a field planted with AAD transgenic corn, is illustrative of the invention and not intended to restrict the scope of this embodiment.

TABLE 1 Control of volunteer AAD-12 Soybean (alone or stacked with other HT traits) in HT Corn Previous year Current year Corn hybrid Soybean hybrid being planted Herbicides option - Burndown/PRE Herbicides option - POST Appl: alone and tank mixes AAD-12 CL Corn Glyphosate, glufosinate, isoxaflutole, Atrazine, clopyralid, diflufenxopyr, RR Corn atrazine, alachlor, clopyralid, foramsulfuron, iodosulfuron, halosulfuron, LL Corn diflufenxopyr, foramsulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT iodosulfuron, halosulfuron, prosulfuron, primisulfuron (need to be aware of GAT + PAT mesotrione, isoxaflutole, nicosulfuron, planting restrictions), glyphosate (only for use GAT + ALS rimsulfuron, prosulfuron, primisulfuron with RR and GAT Corn single gene and stacks), GAT + PAT + ALS (need to be aware of planting glufosinate (only for use with LL corn single Dicamba restrictions) gene or stacks), Dicamba (only for use with Dicamba + LL Dicamba tolerant corn single gene or stacks) Dicamba + RR Dicamba + LL + RR AAD-12 + PAT CL Corn Glyphosate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, RR Corn alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, LL Corn foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of GAT + PAT nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glyphosate (only for use GAT + ALS primisulfuron (need to be aware of with RR and GAT Corn single gene and stacks), GAT + PAT + ALS planting restrictions) Dicamba (only for use with Dicamba tolerant Dicamba corn single gene or stacks) Dicamba + LL Dicamba + RR Dicamba + LL + RR AAD-12 + TIPS CL Corn Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, RR Corn alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, LL Corn foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of GAT + PAT nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glufosinate (only for use GAT + ALS primisulfuron (need to be aware of with LL corn single gene or stacks), Dicamba GAT + PAT + ALS planting restrictions) (only for use with Dicamba tolerant corn single Dicamba gene or stacks) Dicamba + LL Dicamba + RR Dicamba + LL + RR AAD-12 + AHAS CL Corn Glyphosate, glufosinate, isoxaflutole, Atrazine, clopyralid, diflufenxopyr, RR Corn atrazine, alachlor, clopyralid, foramsulfuron, iodosulfuron, halosulfuron, LL Corn diflufenxopyr, foramsulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT iodosulfuron, halosulfuron, prosulfuron, primisulfuron (need to be aware of GAT + PAT mesotrione, isoxaflutole, nicosulfuron, planting restrictions), glyphosate (only for use GAT + ALS rimsulfuron, prosulfuron, primisulfuron with RR and GAT Corn single gene and stacks), GAT + PAT + ALS (need to be aware of planting glufosinate (only for use with LL corn single Dicamba restrictions) gene or stacks), Dicamba (only for use with Dicamba + LL Dicamba tolerant corn single gene or stacks) Dicamba + RR Dicamba + LL + RR AAD-12 + PAT + CL Corn Isoxaflutole, atrazine, alachlor, Atrazine, clopyralid, diflufenxopyr, TIPS RR Corn clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, LL Corn foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of GAT + PAT nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), Dicamba (only for use with GAT + ALS primisulfuron (need to be aware of Dicamba tolerant corn single gene or stacks) GAT + PAT + ALS planting restrictions) Dicamba Dicamba + LL Dicamba + RR Dicamba + LL + RR AAD-12 + PAT + CL Corn Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, AHAS RR Corn alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, LL Corn foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, GAT halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of GAT + PAT nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glyphosate (only for use GAT + ALS primisulfuron (need to be aware of with RR and GAT Corn single gene and stacks), GAT + PAT + ALS planting restrictions) Dicamba (only for use with Dicamba tolerant Dicamba corn single gene or stacks) Dicamba + LL Dicamba + RR Dicamba + LL + RR AAD-12 + GAT CL Corn Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, mesotrione, RR Corn alachlor, clopyralid, glufosinate (only for LL Corn traits), Dicamba LL Corn diflufenxopyr, mesotrione, isoxaflutole (only for use with Dicamba tolerant corn single GAT gene or stacks) GAT + PAT GAT + ALS GAT + PAT + ALS Dicamba Dicamba + LL Dicamba + RR Dicamba + LL + RR Gene and trait footnotes: GT = any glyphosate specific tolerance trait including Roundup Ready (CP4), TIPS EPSPS (GA21, Glytol, DMMG), Athenix's EPSPS, GAT only without ALS, GOX, glyphosate decarboxylase, etc. ALS = double mutant ALS gene insensitive to all ALS herbicide chemistries including IMI herbicides. AAD-1 = Aryloxyalkanoate dioxygenase gene providing tolerance to all commercial phenoxy auxin and all aryloxyphenoxypropionate (fop) herbicides. AAD-12 = Aryloxyalkanoate dioxygenase gene providing tolerance to phenoxyacetic auxin and pyridyloxyacetic auxin herbicides. PAT = phosphinothricin acetyltransferase gene providing tolerance to glutamine synthetase inhibitors including, but not limited to, glufosinate. Similar phenotype is provided by genes such as BAR, DSM1, DSM2, et al. AHAS = imidazolonine specific tolerance gene associated with point mutation at S623 of ALS gene (maize sequence) or equivalent amino acid in other spp (e.g., S653 in Arabidopsis). RR = Roundup Ready trait, implies utility of CP4 gene as commercially deployed either alone or in combination with other genes but imparting glyphosate only tolerance. CL = Clearfield crops, tolerant by nontransgenic means. Primary tolerance is to imidazolinone class of ALS-inhibiting chemistry with some partial tolerance to specific other herbicides with this mode of action. Use of CL designation is intended to distinguish from transgenic use of the AHAS gene. LL = Liberty Link trait, implies utility of either PAT or BAR gene as commercially deployed either alone or in combination with other genes but imparting only tolerance to glutamine synthetase inhibitors such as glufosinate. STS = designates resistance to sulfonylurea herbicide chemistry with use of ALS1 gene. Herbicide footnotes: IMI = any imidazolinone herbicide including, but not limited to, imazapyr, imazethapyr, imazamox, imazaquin. DIMS = cyclohexanedione class of herbicides (dims) including, but not limited to, sethoxydim, clethodim, and for the purposes of this demonstration poinoxaden. Fops = aryloxyphenoxypropionate herbicides (fops) including, but not limited to, quizalofop, haloxyfop, fenoxaprop, fluazifop, et al., their stereospecific isomers or racemic mixtures, and esters, acid, or salts thereof. ALS inhibitors = any ALS inhibitor to the exclusion of IMI's for the sake of this demonstration (i.e., sulfonylureas, triazolopyrimidine sulfonanalides, sulfonylaminocarbonyltriazolinone). HPPD = p-Hydroxyphenyl pyruvate dioxygenase inhibitor class of chemistry including but not limited to mesotrione, sulcotrione, isoxaflutole, and pyrazolynate. MSMA and DSMA = herbicides from the organoarsenicals chemistry family. N/A = No suitable options available postemergence.

TABLE 2 Control of volunteer AAD-12 Soybean (alone or stacked with other HT traits) in AAD-1 Corn Previous year Current year Corn hybrid Soybean hybrid being planted Herbicides option - Burndown/PRE Herbicides option - POST Appl: alone and tank mixes AAD-12 AAD-1 Glyphosate, glufosinate, isoxaflutole, Atrazine, clopyralid, diflufenxopyr, AAD-1 + PAT atrazine, alachlor, clopyralid, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT diflufenxopyr, foramsulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS iodosulfuron, halosulfuron, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS mesotrione, isoxaflutole, nicosulfuron, planting restrictions), glyphosate (only for use AAD-1 + CL rimsulfuron, prosulfuron, primisulfuron with RR and GAT Corn single gene and AAD-1 + PAT + GT (need to be aware of planting stacks), glufosinate (only for use with LL corn AAD-1 + PAT + GAT + ALS restrictions) single gene or stacks) AAD-1 + PAT + AHAS AAD-12 + AAD-1 Glyphosate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, PAT AAD-1 + PAT alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glyphosate (only for use AAD-1 + CL primisulfuron (need to be aware of with RR and GAT Corn single gene and AAD-1 + PAT + GT planting restrictions) stacks) AAD-1 + PAT + GAT + ALS AAD-1 + PAT + AHAS AAD-12 + AAD-1 Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, TIPS AAD-1 + PAT alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glufosinate (only for use AAD-1 + CL primisulfuron (need to be aware of with LL corn single gene or stacks) AAD-1 + PAT + GT planting restrictions) AAD-1 + PAT + GAT + ALS AAD-1 + PAT + AHAS AAD-12 + AAD-1 Glyphosate, glufosinate, isoxaflutole, Atrazine, clopyralid, diflufenxopyr, AHAS AAD-1 + PAT atrazine, alachlor, clopyralid, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT diflufenxopyr, foramsulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS iodosulfuron, halosulfuron, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS mesotrione, isoxaflutole, nicosulfuron, planting restrictions), glyphosate (only for use AAD-1 + CL rimsulfuron, prosulfuron, primisulfuron with RR and GAT Corn single gene and AAD-1 + PAT + GT (need to be aware of planting stacks), glufosinate (only for use with LL corn AAD-1 + PAT + GAT + ALS restrictions) single gene or stacks) AAD-1 + PAT + AHAS AAD-12 + AAD-1 Isoxaflutole, atrazine, alachlor, Atrazine, clopyralid, diflufenxopyr, PAT + TIPS AAD-1 + clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS nicosulfuron, rimsulfuron, prosulfuron, planting restrictions) AAD-1 + CL primisulfuron (need to be aware of AAD-1 + PAT + GT planting restrictions) AAD-1 + PAT + GAT + ALS AAD-1 + PAT + AHAS AAD-12 + AAD-1 Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, PAT + AHAS AAD-1 + PAT alachlor, clopyralid, diflufenxopyr, foramsulfuron, iodosulfuron, halosulfuron, AAD-1 + GT foramsulfuron, iodosulfuron, mesotrione, nicosulfuron, rimsulfuron, AAD-1 + GAT + ALS halosulfuron, mesotrione, isoxaflutole, prosulfuron, primisulfuron (need to be aware of AAD-1 + AHAS nicosulfuron, rimsulfuron, prosulfuron, planting restrictions), glyphosate (only for use AAD-1 + CL primisulfuron (need to be aware of with RR and GAT Corn single gene and AAD-1 + PAT + GT planting restrictions) stacks) AAD-1 + PAT + GAT + ALS AAD-1 + PAT + AHAS AAD-12 + AAD-1 Glufosinate, isoxaflutole, atrazine, Atrazine, clopyralid, diflufenxopyr, mesotrione, GAT AAD-1 + PAT alachlor, clopyralid, glufosinate (only for LL Corn and AAD-1 + PAT AAD-1 + GT diflufenxopyr, mesotrione, isoxaflutole based traits) AAD-1 + GAT + ALS AAD-1 + AHAS AAD-1 + CL AAD-1 + PAT + GT AAD-1 + PAT + GAT + ALS AAD-1 + PAT + AHAS Gene and trait footnotes: GT = any glyphosate specific tolerance trait including Roundup Ready (CP4), TIPS EPSPS (GA21, Glytol, DMMG), Athenix's EPSPS, GAT only without ALS, GOX, glyphosate decarboxylase, etc. ALS = double mutant ALS gene insensitive to all ALS herbicide chemistries including IMI herbicides. AAD-1 = Aryloxyalkanoate dioxygenase gene providing tolerance to all commercial phenoxy auxin and all aryloxyphenoxypropionate (fop) herbicides. AAD-12 = Aryloxyalkanoate dioxygenase gene providing tolerance to phenoxyacetic auxin and pyridyloxyacetic auxin herbicides. PAT = phosphinothricin acetyltransferase gene providing tolerance to glutamine synthetase inhibitors including, but not limited to, glufosinate. Similar phenotype is provided by genes such as BAR, DSM1, DSM2, et al. AHAS = imidazolonine specific tolerance gene associated with point mutation at S623 of ALS gene (maize sequence) or equivalent amino acid in other spp (e.g., S653 in Arabidopsis). RR = Roundup Ready trait, implies utility of CP4 gene as commercially deployed either alone or in combination with other genes but imparting glyphosate only tolerance. CL = Clearfield crops, tolerant by nontransgenic means. Primary tolerance is to imidazolinone class of ALS-inhibiting chemistry with some partial tolerance to specific other herbicides with this mode of action. Use of CL designation is intended to distinguish from transgenic use of the AHAS gene. LL = Liberty Link trait, implies utility of either PAT or BAR gene as commercially deployed either alone or in combination with other genes but imparting only tolerance to glutamine synthetase inhibitors such as glufosinate. STS = designates resistance to sulfonylurea herbicide chemistry with use of ALS1 gene. Herbicide footnotes: IMI = any imidazolinone herbicide including, but not limited to, imazapyr, imazethapyr, imazamox, imazaquin. DIMS = cyclohexanedione class of herbicides (dims) including, but not limited to, sethoxydim, clethodim, and for the purposes of this demonstration poinoxaden. Fops = aryloxyphenoxypropionate herbicides (fops) including, but not limited to, quizalofop, haloxyfop, fenoxaprop, fluazifop, et al., their stereospecific isomers or racemic mixtures, and esters, acid, or salts thereof. ALS inhibitors = any ALS inhibitor to the exclusion of IMI's for the sake of this demonstration (i.e., sulfonylureas, triazolopyrimidine sulfonanalides, sulfonylaminocarbonyltriazolinone). HPPD = p-Hydroxyphenyl pyruvate dioxygenase inhibitor class of chemistry including but not limited to mesotrione, sulcotrione, isoxaflutole, and pyrazolynate. MSMA and DSMA = herbicides from the organoarsenicals chemistry family. N/A = No suitable options available postemergence.

TABLE 3 Control of volunteer Soybean (alone or stacked with other Herbicide Tolerant traits) in AAD-1-based Corn Previous year Soybean Current year Corn hybrid hybrid being planted Herbicides option - Burndown/PRE Herbicides option - POST Appl: alone and tank mixes CL AAD-1 Glyphosate, glufosinate, bromoxynil, 2,4-D, HPPD AAD-1 + PAT metribuzin, clomazone, flufenacet, s- 2,4-D, HPPD, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, HPPD, glyphosate AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, HPPD, glufosinate, glyphosate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, HPPD, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD, glyphosate, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron RR AAD-1 Glufosinate, bromoxynil, metribuzin, 2,4-D, HPPD AAD-1 + PAT clomazone, flufenacet, s- 2,4-D, HPPD, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, HPPD AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, HPPD, glufosinate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, HPPD, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron LL AAD-1 Glyphosate, bromoxynil, metribuzin, 2,4-D, HPPD AAD-1 + PAT clomazone, flufenacet, s- 2,4-D, HPPD AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, HPPD, glyphosate AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, HPPD, glyphosate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, HPPD AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD, glyphosate, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron GAT AAD-1 Glufosinate, bromoxynil, metribuzin, 2,4-D, HPPD AAD-1 + PAT clomazone, flufenacet, s- 2,4-D, HPPD, glufosinate AAD-1 + TIPS metolachlor + fomesafen, pendimethalin 2,4-D, HPPD AAD-1 + AHAS 2,4-D, HPPD AAD-1 + PAT + TIPS 2,4-D, HPPD, glufosinate AAD-1 + PAT + AHAS 2,4-D, HPPD, glufosinate AAD-1 + GAT 2,4-D, HPPD HPPD AAD-1 Glyphosate, glufosinate, bromoxynil, 2,4-D AAD-1 + PAT metribuzin, clomazone, flufenacet, s- 2,4-D, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, glyphosate AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, glufosinate, glyphosate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, glyphosate, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Dicamba AAD-1 Glyphosate, glufosinate, bromoxynil, 2,4-D, HPPD AAD-1 + PAT metribuzin, clomazone, flufenacet, s- 2,4-D, HPPD, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, HPPD, glyphosate AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, HPPD, glufosinate, glyphosate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, HPPD, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD, glyphosate, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Dicamba + RR AAD-1 glufosinate, bromoxynil, metribuzin, 2,4-D, HPPD AAD-1 + PAT clomazone, flufenacet, s- 2,4-D, HPPD, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D, HPPD AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, HPPD, glufosinate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, HPPD, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Dicamba + LL + RR AAD-1 bromoxynil, metribuzin, clomazone, 2,4-D, HPPD AAD-1 + PAT flufenacet, s-metolachlor + fomesafen, 2,4-D, HPPD AAD-1 + TIPS pendimethalin, ALS herbicides not 2,4-D, HPPD AAD-1 + AHAS recommended for soybeans (need to 2,4-D, HPPD AAD-1 + PAT + TIPS be aware of planting restrictions): 2,4-D, HPPD AAD-1 + PAT + AHAS tribenuron, nicosulfuron, rimsulfuron 2,4-D, HPPD AAD-1 + GAT 2,4-D, HPPD, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Dicamba + RR + HPPD AAD-1 glufosinate, bromoxynil, metribuzin, 2,4-D AAD-1 + PAT clomazone, flufenacet, s- 2,4-D, glufosinate AAD-1 + TIPS metolachlor + fomesafen, 2,4-D AAD-1 + AHAS pendimethalin, ALS herbicides not 2,4-D AAD-1 + PAT + TIPS recommended for soybeans (need to 2,4-D, glufosinate AAD-1 + PAT + AHAS be aware of planting restrictions): 2,4-D, glufosinate AAD-1 + GAT tribenuron, nicosulfuron, rimsulfuron 2,4-D, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Dicamba + LL + RR + AAD-1 bromoxynil, metribuzin, clomazone, 2,4-D HPPD AAD-1 + PAT flufenacet, s-metolachlor + fomesafen, 2,4-D AAD-1 + TIPS pendimethalin, ALS herbicides not 2,4-D AAD-1 + AHAS recommended for soybeans (need to 2,4-D AAD-1 + PAT + TIPS be aware of planting restrictions): 2,4-D AAD-1 + PAT + AHAS tribenuron, nicosulfuron, rimsulfuron 2,4-D AAD-1 + GAT 2,4-D, ALS herbicides (sulfonylureas, triazolopyrimidine sulfonanalides, sulfobylamino carbonyl triazolinones) except imazaquin, imazpyr, imazamox, imazethapyr, chlorimuron, thifensulfuron Gene and trait footnotes: GT = any glyphosate specific tolerance trait including Roundup Ready (CP4), TIPS EPSPS (GA21, Glytol, DMMG), Athenix's EPSPS, GAT only without ALS, GOX, glyphosate decarboxylase, etc. ALS = double mutant ALS gene insensitive to all ALS herbicide chemistries including IMI herbicides. AAD-1 = Aryloxyalkanoate dioxygenase gene providing tolerance to all commercial phenoxy auxin and all aryloxyphenoxypropionate (fop) herbicides. AAD-12 = Aryloxyalkanoate dioxygenase gene providing tolerance to phenoxyacetic auxin and pyridyloxyacetic auxin herbicides. PAT = phosphinothricin acetyltransferase gene providing tolerance to glutamine synthetase inhibitors including, but not limited to, glufosinate. Similar phenotype is provided by genes such as BAR, DSM1, DSM2, et al. AHAS = imidazolonine specific tolerance gene associated with point mutation at S623 of ALS gene (maize sequence) or equivalent amino acid in other spp (e.g., S653 in Arabidopsis). RR = Roundup Ready trait, implies utility of CP4 gene as commercially deployed either alone or in combination with other genes but imparting glyphosate only tolerance. CL = Clearfield crops, tolerant by nontransgenic means. Primary tolerance is to imidazolinone class of ALS-inhibiting chemistry with some partial tolerance to specific other herbicides with this mode of action. Use of CL designation is intended to distinguish from transgenic use of the AHAS gene. LL = Liberty Link trait, implies utility of either PAT or BAR gene as commercially deployed either alone or in combination with other genes but imparting only tolerance to glutamine synthetase inhibitors such as glufosinate. STS = designates resistance to sulfonylurea herbicide chemistry with use of ALS1 gene. Herbicide footnotes: IMI = any imidazolinone herbicide including, but not limited to, imazapyr, imazethapyr, imazamox, imazaquin. DIMS = cyclohexanedione class of herbicides (dims) including, but not limited to, sethoxydim, clethodim, and for the purposes of this demonstration poinoxaden. Fops = aryloxyphenoxypropionate herbicides (fops) including, but not limited to, quizalofop, haloxyfop, fenoxaprop, fluazifop, et al., their stereospecific isomers or racemic mixtures, and esters, acid, or salts thereof. ALS inhibitors = any ALS inhibitor to the exclusion of IMI's for the sake of this demonstration (i.e., sulfonylureas, triazolopyrimidine sulfonanalides, sulfonylaminocarbonyltriazolinone). HPPD = p-Hydroxyphenyl pyruvate dioxygenase inhibitor class of chemistry including but not limited to mesotrione, sulcotrione, isoxaflutole, and pyrazolynate. MSMA and DSMA = herbicides from the organoarsenicals chemistry family. N/A = No suitable options available postemergence. 

The invention claimed is:
 1. A method of controlling aryloxy alkanoate dioxygenase 12 (AAD-12) dicot soybean volunteer plants in a field comprising monocot plants, said soybean volunteer plants comprising Event DAS-68416-4 as available in seed deposited under ATCC deposit number PTA10442, said soybean volunteer plants comprising an AAD-12 gene that encodes an AAD-12 protein, wherein said method comprises applying a herbicide to said soybean volunteer plants.
 2. The method of claim 1, wherein said monocot plants are corn plants.
 3. The method of claim 1, wherein said herbicide is selected from the group consisting of dicamba, clopyralid, and a triazine.
 4. The method of claim 1, wherein said triazine herbicide is atrazine.
 5. The method of claim 1, wherein said monocot plant comprises a glyphosate- and/or a glufosinate-tolerance gene.
 6. The method of claim 1, wherein said volunteer plants further comprise a glyphosate-tolerance gene, and said herbicide is selected from the group consisting of dicamba, clopyralid, and a triazine.
 7. The method of claim 1, wherein said herbicide is glyphosate. 